Add net shell
Merged Ollo's changes into master
moved some shell command from main.c into a new cmd folder
Reset dmx break time to 125µs
FC updated
ifconfig cmd can change ip
add ini parser from https://code.google.com/p/inih/
Network config could be read from sdcard
mac address could be read too
Merged master into ollo-dev (SDcard is read on bootup)